Tests Spark Plugs, Spark Plug Wires and Coils Without Puncturing the Wire.
The Narrow Profile Allows Access to Spark Plug Holes in Confined Spaces.
Fits Spark Plug Holes with Limited Access.
Double-Ended for Both 14mm & 18mm Threads.
Quickly and Accurately Check Compression on Gasoline Engines.
Easy reading gauge.
10mm Spark Plug Adapters for 20250 Compression Tester.
12mm Spark Plug Adapters for 20250 Compression Tester.
Gives a Visual Check of the Ignition System.
Tough, Smooth-working Reliable Switch.